Home / 30,458.31-42,039.26-18,519.12

Finding the Fourth Proportional to 30,458.31, 42,039.26 and 18,519.12

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Solution

The fourth proportional to 30,458.31, 42,039.26 and 18,519.12 is: 25,560.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,458.31 : 42,039.26 = 18,519.12 : x
  2. Step 2: Convert to fraction form
    30,458.31/42,039.26 = 18,519.12/x
  3. Step 3: Cross multiply
    30,458.31x = 42,039.26 × 18,519.12
  4. Step 4: Simplify right side
    30,458.31x = 778,530,008.06
  5. Step 5: Solve for x
    x = 778,530,008.06/30,458.31
  6. Step 6: Final answer
    x = 25,560.51

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.